Shutter for use with motion-picture apparatus having interlocking parts.



F. c'. HAMILTON.

SHUTTER FOR USE WITH MOTION PICTURE APPARATUS HAVTNG INTERLOCKING PARTS.

' APPuc/nmu men SEPT. 30 19x5.

' 1,210,063. Patented Dec. 26,1916.

ix/Rh me D I v a w'ewtoz smrns PATENT OFFICE FRANK HAMILTON, OF NEWYORK, N. Y., ASSIGNOR TO EUREKA PROJECTOR :DTEFVICE CO., INC., OF NEWYORK, N. Y., A CORPORATION OF NEW YORK.

SHUTTER FOR USE WITH MOTION-PICTURE APPARATUS HAVING IN TERLOCKINGPARTS.

To an whom it may concern:

. Be it known that I, FRANK C. HAMILTON,

a citizen of the United States, residing at New York, in the county ofNew York and State of New York, have invented certain new and usefulImprovements in Shutters for Use with Motion-Picture Apparatus HavingInterlocking Parts, of which the following is a speci cation.

This invention relates tothe motion -pic ture art, and concerns itselfparticularly with improvements in revolving shutters for use inprojecting apparatus.

One of theobjects of the invention is to provide a shutter in which theusual opaque vanes are replaced by glass sectors, or vanes, which, whiletransparent, cause a destruction of focus or the. diffusion of lightrays passing through them, and to arrange for ready and effectiveassembling of such vanes with the usual revolving shutter shaft of aprojecting apparatus. v

In the accompanying drawings, which are to be taken as a part of thisspecification, and in which I have shown a merely preferred form ofembodiment of the invention,

' Figure l isa side elevation of such an em -bodiment, with certainparts removed; Fig. 2 is a view similar to Fig. l, of anotherembodiment; Fig. 3 is also a side elevation disclosing the embodiment ofFig. 1 or Fig. 2

with the addition of the parts omitted from i those figures; and Fig. 4is a sectional View, on an enlarged scale, taken on the line 44 of Fig.3.

Referrin to the numerals on the drawings, '5 in icates a seat member,rovided with a plurality of cut-through seats or slots, each of which isintended for dovetail or interlocking engagement with-the cooperant andcorrespondingly shaped shank of a vane 6. The seat member istransversely centrally bored at 7 to accommodate a sleeve'B, which isexteriorly threaded adaperture 8".

"duplicate pair of-side shields 9, each of the outline indicated in Fig.3, are centrally bored so as also'to take about the sleeve 8 when saidside shields are riveted or, bolted to the sea-t member 5 and maintainsaid seat member and varies 6 interlocked as aforesaid.

'jacent one end at 8, and provided with an It will be noted that none ofthese rivets or bolts pass through any of the vanes.

Specification of Letters Patent.

'structed of glass, unitary molded piece, it is obvious that the 'member5 and the shanks shown at 6 Patented Dec. 26, 1916.

Application filed September 30, 1915. Serial No. 53,238.

Each vane 6 is thicker in its shank than elsewhere, and the arcuateedges of side shields 9 are inturned against arcuate shoulders, onecarried on each side of each vane and marking the merging of avane-blade into its shank.

A trifurcated flat spring l0 is riveted to one of said side shields asshown best inFig. 3. This spring 10 has centrally ofi'set there from asleeve 10' adapted to take about sleeve 8. Sleeve 10 carries a threadedaperture for a set screw 11; the set'screwbeing spirally adjustable sothat its shank may pass through sleeve 8s aperture 8 and have the tip ofthe shank forced tight against the usual revolving shutter shaft 12-(Fig. 4) usually found in projecting apparatus.

With sleeves 8 and 10 thus mounted fixedly on shaft 12, the shutter isadjusted against end thrust on said shaft by means of (Fig. 4

'predeterminedly transversely of the light rays from'the illuminatorwithin the projecting apparatus, diffuses said light rays suifi cientlyto project onto theusual screen noth ing more-than apparently immobileand even area of illumination. Since, therefore,- said vanes 6 may mostadvantageously be com each. preferablybeing a interlocking arrangementbetween the seat of the vanes, renders possible the use of the sideshields 9, to completely nest said vanes against any inadvertentwithdrawal or lossfrom their be fixed in place upon the seat memberwithout any necessity for the vane shanks to be drilled or cut for thepassage therethrough of bolts, rivets or other fasteners.

While the outlines of the vane shanks shown in Fig. 1 differ from thoseshown in Fig. 2, and while the two uppermost ones in Fig. '2 differ inoutline from the other one in saidFig. 2, it willbe seen that theinterlocking characteristic is present in each. In passing, it may bestated that the types in Fig. 2 are now deemed preferable.

preliminary interlocking with the seat memher 5, but also permits saidside shields 9 to V For purposes which need not be mentioned in thisapplication, one of each of the shown sets of vanes 6 is larger than theother vanes in. the set. However, and despite the illustrative showingof Fig. 2, in any set all the vane shanks are preferably duplicates.This, to ether with the fact that easily demountable bolts passingthrough side shields 9 and seat member '5 may advantageously be employed as indicated, renders convenient and inexpensive, both from amanufacturing and fro'ma maintenance standpoint, the substitution'ofavane 6 in any of the cut through slots or seats of the seat member.

. An important feature of the present invention is the provision of asingleseat memher 5 for the several vane shanks which, in addition tohaving the advantages aforesaid and obvious, may be constructed of somecushioning material, such as hard rubber,

. compressed fiber, cork, leather or the like.

Inasmuch as many changes could be made 'in the.above construction, andmany apparently widely different embodiments of my invention could bemade without departing from the scope thereof, it is intended that allmatter contained inthe above description or shown in the accompanyingdrawings shall be interpreted as illustrative andnot in limiting sense.

It is also to be understood that the language used in the followingclaims is in-' tended to cover all the gener1c and speclfic features ofthe invention herein described and all statements-of the scope of theinvention which, as a matter of language, mlgh be said tofalltherebetween.

I claim:

1. In arotatable shutter having a plurality of removable vanes, arotatable seat member from which said vanes project and provided withrecesses removed from and opening away from the centerof rotation ofsaid member, each of said vanes-having a shank so conformed thatwithsaid shank sidewisely advanced to become seated in one of saidrecesses said vane is locked in said recess against withdrawal radiallyof said center of rotation.

2. In a rotatable shutter having'a plurality of removable vanes, arotatable seat memher from which said'vanes project and provided withrecesses removed from and opening away from the center of rotation ofsaid member, each of said vanes having a shank so conformed that withsaid shank 'sidewisely advanced to become seated in one of said recessessaid vane is locked in said recess against w thdrawal radially of saidcenter of rotatlon, said recesses all being similar and said shanks allbeing similar.

3'. In a rotatable shutter having a plurality of removable vanesparotatable seat member from which said vanes project and provided withrecesses removed from and opening away from the center of rotation ofsaid member, each of said vanes having a shank so conformedthat withsaid shank sidewisely advanced to become seated in one of said recessessaid vane is locked in said recess against withdrawal radially of saidcenter of rotation, in combination with a pair of duplicate side shieldseach overlapping said recesses.

1. In a rotatable, shutter having a plurality of removable vanes, arotatable seat member from which said vanes'project and providedwithrecesses removed from and opening away from the center of rotation ofsaid member, each of said vanes having a shank soconformed that withsaid shank sidewisely advanced to become seated in one of said recessessaid vane is locked in said recess against withdrawal radially of saidcenter of rotation, in combination with a pair of duplicate side shieldseach overlapping said recesses, and fastening means for attaching saidside shields one oneach side of said seat member.

5. In a rotatable shutter having a plui rality of removable vanes, arotatable seat member from which said vanes project and provided withrecesses removed from and open ng away from the center of rotation ofsaid member, each of said vanes having a 'shank so conformed that withsaid shank sidewisely advanced to become seated in one of said recessessaid vane is locked in said recess against withdrawal radially of said icenter of rotation, said seat member being .composed of some cushioningmaterial.

6. In a rotatable shutter having a 'plurality of removable vanes, arotatable seat member from which said vanes project and proiuded withrecesses removed from and opening away from the center of rotation ofsaid member, each of said vanes having a .shank so conformed that withsaid shank sidewisely advanced to become seated in one of said recessessaid vane is locked in said recessagainst withdrawal radlally of said-

